Recommended server directory structure/Lightest desktop possible

I intend to use my recently acquired Shuttle PC (1.8Ghz celeron) as a sand box application and web server for my internal network. Knowing I'll be going off of this http://www.ubuntugeek.com/linux-or-u...structure.html webpage, where would be the ideal location to install application beyond what comes with Ubuntu server. I already have Tomcat installed as well as a few others but beyond apt I may want to install my own stuff.

/

I'm not sure the set up can handle having a desktop running as the response time even using Xubunut (Lubuntu was bugging too) so once I have it set up I may want a extremely minimal (window manager and a basic browser) desktop. Recommendations?

Re: Recommended server directory structure/Lightest desktop possible

My server only has a power cord and network cable connected, so I administer it remotely, file manipulation is done via sftp, and everything else I do via ssh. That being said, you can install any graphical desktop, just don't install a desktop manager eg: gdm, kdm, xdm etc, then at the prompt, use: